1 /* $NetBSD: exec_aout.h,v 1.1 2018/12/31 13:35:16 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1993, 1994 Christopher G. Demetriou 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Christopher G. Demetriou. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #ifndef _SYS_EXEC_AOUT_H_ 34 #define _SYS_EXEC_AOUT_H_ 35 36 #ifndef N_PAGSIZ 37 #define N_PAGSIZ(ex) (AOUT_LDPGSZ) 38 #endif 39 40 /* 41 * Header prepended to each a.out file. 42 * only manipulate the a_midmag field via the 43 * N_SETMAGIC/N_GET{MAGIC,MID,FLAG} macros below. 44 */ 45 struct exec { 46 uint32_t a_midmag; /* htonl(flags<<26 | mid<<16 | magic) */ 47 uint32_t a_text; /* text segment size */ 48 uint32_t a_data; /* initialized data size */ 49 uint32_t a_bss; /* uninitialized data size */ 50 uint32_t a_syms; /* symbol table size */ 51 uint32_t a_entry; /* entry point */ 52 uint32_t a_trsize; /* text relocation size */ 53 uint32_t a_drsize; /* data relocation size */ 54 }; 55 56 /* a_magic */ 57 #define OMAGIC 0407 /* old impure format */ 58 #define NMAGIC 0410 /* read-only text */ 59 #define ZMAGIC 0413 /* demand load format */ 60 #define QMAGIC 0314 /* "compact" demand load format; deprecated */ 61 62 #include <sys/aout_mids.h> 63 64 /* 65 * a_flags 66 */ 67 #define EX_DYNAMIC 0x20 68 #define EX_PIC 0x10 69 #define EX_DPMASK 0x30 70 /* 71 * Interpretation of the (a_flags & EX_DPMASK) bits: 72 * 73 * 00 traditional executable or object file 74 * 01 object file contains PIC code (set by `as -k') 75 * 10 dynamic executable 76 * 11 position independent executable image 77 * (eg. a shared library) 78 * 79 */ 80 81 /* 82 * The a.out structure's a_midmag field is a network-byteorder encoding 83 * of this int 84 * FFFFFFmmmmmmmmmmMMMMMMMMMMMMMMMM 85 * Where `F' is 6 bits of flag like EX_DYNAMIC, 86 * `m' is 10 bits of machine-id like MID_I386, and 87 * `M' is 16 bits worth of magic number, ie. ZMAGIC. 88 * The macros below will set/get the needed fields. 89 */ 90 #define N_GETMAGIC(ex) \ 91 ((((ex).a_midmag)&0xffff0000) ? \ 92 (be32toh((uint32_t)((ex).a_midmag))&0xffff) : ((ex).a_midmag)) 93 #define N_GETMAGIC2(ex) \ 94 ((((ex).a_midmag)&0xffff0000) ? \ 95 (be32toh((uint32_t)((ex).a_midmag))&0xffff) : (((ex).a_midmag) | 0x10000)) 96 #define N_GETMID(ex) \ 97 ((((ex).a_midmag)&0xffff0000) ? \ 98 ((be32toh((uint32_t)((ex).a_midmag))>>16)&0x03ff) : MID_ZERO) 99 #define N_GETFLAG(ex) \ 100 ((((ex).a_midmag)&0xffff0000) ? \ 101 ((be32toh((uint32_t)((ex).a_midmag))>>26)&0x3f) : 0) 102 #define N_SETMAGIC(ex,mag,mid,flag) \ 103 ((ex).a_midmag = htobe32((uint32_t) \ 104 ((((flag)&0x3f)<<26)|(((mid)&0x03ff)<<16)|(((mag)&0xffff))))) 105 106 #define N_ALIGN(ex,x) \ 107 (N_GETMAGIC(ex) == ZMAGIC || N_GETMAGIC(ex) == QMAGIC ? \ 108 ((x) + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1) : (x)) 109 110 /* Valid magic number check. */ 111 #define N_BADMAG(ex) \ 112 (N_GETMAGIC(ex) != NMAGIC && N_GETMAGIC(ex) != OMAGIC && \ 113 N_GETMAGIC(ex) != ZMAGIC && N_GETMAGIC(ex) != QMAGIC) 114 115 /* Address of the bottom of the text segment. */ 116 #define N_TXTADDR(ex) (N_GETMAGIC2(ex) == (ZMAGIC|0x10000) ? 0 : AOUT_LDPGSZ) 117 118 /* Address of the bottom of the data segment. */ 119 #define N_DATADDR(ex) \ 120 (N_GETMAGIC(ex) == OMAGIC ? N_TXTADDR(ex) + (ex).a_text : \ 121 (N_TXTADDR(ex) + (ex).a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1)) 122 123 /* Address of the bottom of the bss segment. */ 124 #define N_BSSADDR(ex) \ 125 (N_DATADDR(ex) + (ex).a_data) 126 127 /* Text segment offset. */ 128 #define N_TXTOFF(ex) \ 129 ( N_GETMAGIC2(ex)==ZMAGIC || N_GETMAGIC2(ex)==(QMAGIC|0x10000) ? \ 130 0 : (N_GETMAGIC2(ex)==(ZMAGIC|0x10000) ? AOUT_LDPGSZ : \ 131 sizeof(struct exec)) ) 132 133 /* Data segment offset. */ 134 #define N_DATOFF(ex) \ 135 N_ALIGN(ex, N_TXTOFF(ex) + (ex).a_text) 136 137 /* Text relocation table offset. */ 138 #define N_TRELOFF(ex) \ 139 (N_DATOFF(ex) + (ex).a_data) 140 141 /* Data relocation table offset. */ 142 #define N_DRELOFF(ex) \ 143 (N_TRELOFF(ex) + (ex).a_trsize) 144 145 /* Symbol table offset. */ 146 #define N_SYMOFF(ex) \ 147 (N_DRELOFF(ex) + (ex).a_drsize) 148 149 /* String table offset. */ 150 #define N_STROFF(ex) \ 151 (N_SYMOFF(ex) + (ex).a_syms) 152 153 #include <machine/aout_machdep.h> 154 155 #ifdef _KERNEL 156 157 /* the "a.out" format's entry in the exec switch */ 158 int exec_aout_makecmds(struct lwp *, struct exec_package *); 159 160 /* functions which prepare various a.out executable types */ 161 /* 162 * MI portion 163 */ 164 int exec_aout_prep_zmagic(struct lwp *, struct exec_package *); 165 int exec_aout_prep_nmagic(struct lwp *, struct exec_package *); 166 int exec_aout_prep_omagic(struct lwp *, struct exec_package *); 167 168 /* For compatibility modules */ 169 int exec_aout_prep_oldzmagic(struct lwp *, struct exec_package *); 170 int exec_aout_prep_oldnmagic(struct lwp *, struct exec_package *); 171 int exec_aout_prep_oldomagic(struct lwp *, struct exec_package *); 172 173 /* 174 * MD portion 175 */ 176 #ifndef cpu_exec_aout_makecmds 177 int cpu_exec_aout_makecmds(struct lwp *, struct exec_package *); 178 #endif 179 180 #endif /* _KERNEL */ 181 182 #endif /* !_SYS_EXEC_AOUT_H_ */ 183
Indexes created Sat Sep 20 22:09:52 GMT 2025